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Title: Metals processing control by counting molten metal droplets

Abstract

Apparatus and method for controlling metals processing (e.g., ESR) by melting a metal ingot and counting molten metal droplets during melting. An approximate amount of metal in each droplet is determined, and a melt rate is computed therefrom. Impedance of the melting circuit is monitored, such as by calculating by root mean square a voltage and current of the circuit and dividing the calculated current into the calculated voltage. Analysis of the impedance signal is performed to look for a trace characteristic of formation of a molten metal droplet, such as by examining skew rate, curvature, or a higher moment.

Inventors:
 [1];  [2];  [1];  [3];  [4]
  1. Albuquerque, NM
  2. Safford, AZ
  3. Tijeras, NM
  4. Corrales, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
872835
Patent Number(s):
6019811
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
metals; processing; control; counting; molten; metal; droplets; apparatus; method; controlling; esr; melting; ingot; approximate; amount; droplet; determined; melt; rate; computed; therefrom; impedance; circuit; monitored; calculating; root; mean; square; voltage; current; dividing; calculated; analysis; signal; performed; look; trace; characteristic; formation; examining; skew; curvature; moment; metal droplets; molten metal; root mean; mean square; metals processing; metal droplet; metal ingot; counting molten; /75/

Citation Formats

Schlienger, Eric, Robertson, Joanna M, Melgaard, David, Shelmidine, Gregory J, and Van Den Avyle, James A. Metals processing control by counting molten metal droplets. United States: N. p., 2000. Web.
Schlienger, Eric, Robertson, Joanna M, Melgaard, David, Shelmidine, Gregory J, & Van Den Avyle, James A. Metals processing control by counting molten metal droplets. United States.
Schlienger, Eric, Robertson, Joanna M, Melgaard, David, Shelmidine, Gregory J, and Van Den Avyle, James A. Sat . "Metals processing control by counting molten metal droplets". United States. https://www.osti.gov/servlets/purl/872835.
@article{osti_872835,
title = {Metals processing control by counting molten metal droplets},
author = {Schlienger, Eric and Robertson, Joanna M and Melgaard, David and Shelmidine, Gregory J and Van Den Avyle, James A},
abstractNote = {Apparatus and method for controlling metals processing (e.g., ESR) by melting a metal ingot and counting molten metal droplets during melting. An approximate amount of metal in each droplet is determined, and a melt rate is computed therefrom. Impedance of the melting circuit is monitored, such as by calculating by root mean square a voltage and current of the circuit and dividing the calculated current into the calculated voltage. Analysis of the impedance signal is performed to look for a trace characteristic of formation of a molten metal droplet, such as by examining skew rate, curvature, or a higher moment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Works referenced in this record:

Theory and Practice of Electroslag Melting
journal, November 1970